.buffer{
    margin: 40px auto;
    background-color: bisque;
    width: 300px;
    height: 500px;
}
.button{
    width: 80px;
    height: 60px;
    line-height: 60px;
    display: inline-block;
    text-align: center;
    font-size: 32px;
    user-select: none;
    cursor: pointer;
    border-radius: 4px;
    background-color: #777;
    margin: 40px;

}